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293 lines
7.6 KiB
293 lines
7.6 KiB
/*!
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\file gd32vf103_bkp.c
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\brief BKP driver
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\version 2019-06-05, V1.0.0, firmware for GD32VF103
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32vf103_bkp.h"
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/* BKP register bits offset */
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#define BKP_TAMPER_BITS_OFFSET ((uint32_t)8U)
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/*!
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\brief reset BKP registers
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_deinit(void)
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{
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/* reset BKP domain register*/
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rcu_bkp_reset_enable();
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rcu_bkp_reset_disable();
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}
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/*!
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\brief write BKP data register
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\param[in] register_number: refer to bkp_data_register_enum
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only one parameter can be selected which is shown as below:
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\arg BKP_DATA_x(x = 0..41): bkp data register number x
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\param[in] data: the data to be write in BKP data register
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\param[out] none
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\retval none
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*/
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void bkp_data_write(bkp_data_register_enum register_number, uint16_t data)
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{
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if((register_number >= BKP_DATA_10) && (register_number <= BKP_DATA_41)){
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BKP_DATA10_41(register_number - 1U) = data;
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}else if((register_number >= BKP_DATA_0) && (register_number <= BKP_DATA_9)){
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BKP_DATA0_9(register_number - 1U) = data;
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}else{
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/* illegal parameters */
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}
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}
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/*!
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\brief read BKP data register
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\param[in] register_number: refer to bkp_data_register_enum
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only one parameter can be selected which is shown as below:
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\arg BKP_DATA_x(x = 0..41): bkp data register number x
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\param[out] none
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\retval data of BKP data register
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*/
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uint16_t bkp_data_read(bkp_data_register_enum register_number)
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{
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uint16_t data = 0U;
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/* get the data from the BKP data register */
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if((register_number >= BKP_DATA_10) && (register_number <= BKP_DATA_41)){
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data = BKP_DATA10_41(register_number - 1U);
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}else if((register_number >= BKP_DATA_0) && (register_number <= BKP_DATA_9)){
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data = BKP_DATA0_9(register_number - 1U);
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}else{
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/* illegal parameters */
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}
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return data;
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}
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/*!
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\brief enable RTC clock calibration output
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_rtc_calibration_output_enable(void)
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{
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BKP_OCTL |= (uint16_t)BKP_OCTL_COEN;
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}
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/*!
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\brief disable RTC clock calibration output
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_rtc_calibration_output_disable(void)
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{
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BKP_OCTL &= (uint16_t)~BKP_OCTL_COEN;
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}
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/*!
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\brief enable RTC alarm or second signal output
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_rtc_signal_output_enable(void)
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{
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BKP_OCTL |= (uint16_t)BKP_OCTL_ASOEN;
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}
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/*!
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\brief disable RTC alarm or second signal output
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_rtc_signal_output_disable(void)
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{
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BKP_OCTL &= (uint16_t)~BKP_OCTL_ASOEN;
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}
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/*!
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\brief select RTC output
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\param[in] outputsel: RTC output selection
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only one parameter can be selected which is shown as below:
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\arg RTC_OUTPUT_ALARM_PULSE: RTC alarm pulse is selected as the RTC output
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\arg RTC_OUTPUT_SECOND_PULSE: RTC second pulse is selected as the RTC output
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\param[out] none
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\retval none
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*/
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void bkp_rtc_output_select(uint16_t outputsel)
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{
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uint16_t ctl = 0U;
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/* configure BKP_OCTL_ROSEL with outputsel */
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ctl = BKP_OCTL;
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ctl &= (uint16_t)~BKP_OCTL_ROSEL;
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ctl |= outputsel;
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BKP_OCTL = ctl;
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}
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/*!
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\brief set RTC clock calibration value
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\param[in] value: RTC clock calibration value
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\arg 0x00 - 0x7F
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\param[out] none
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\retval none
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*/
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void bkp_rtc_calibration_value_set(uint8_t value)
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{
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uint16_t ctl;
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/* configure BKP_OCTL_RCCV with value */
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ctl = BKP_OCTL;
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ctl &= (uint16_t)~BKP_OCTL_RCCV;
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ctl |= (uint16_t)OCTL_RCCV(value);
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BKP_OCTL = ctl;
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}
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/*!
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\brief enable tamper detection
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_tamper_detection_enable(void)
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{
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BKP_TPCTL |= (uint16_t)BKP_TPCTL_TPEN;
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}
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/*!
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\brief disable tamper detection
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_tamper_detection_disable(void)
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{
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BKP_TPCTL &= (uint16_t)~BKP_TPCTL_TPEN;
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}
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/*!
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\brief set tamper pin active level
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\param[in] level: tamper active level
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only one parameter can be selected which is shown as below:
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\arg TAMPER_PIN_ACTIVE_HIGH: the tamper pin is active high
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\arg TAMPER_PIN_ACTIVE_LOW: the tamper pin is active low
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\param[out] none
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\retval none
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*/
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void bkp_tamper_active_level_set(uint16_t level)
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{
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uint16_t ctl = 0U;
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/* configure BKP_TPCTL_TPAL with level */
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ctl = BKP_TPCTL;
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ctl &= (uint16_t)~BKP_TPCTL_TPAL;
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ctl |= level;
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BKP_TPCTL = ctl;
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}
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/*!
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\brief enable tamper interrupt
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_interrupt_enable(void)
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{
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BKP_TPCS |= (uint16_t)BKP_TPCS_TPIE;
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}
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/*!
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\brief disable tamper interrupt
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_interrupt_disable(void)
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{
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BKP_TPCS &= (uint16_t)~BKP_TPCS_TPIE;
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}
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/*!
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\brief get tamper flag state
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\param[in] none
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\param[out] none
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\retval FlagStatus: SET or RESET
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*/
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FlagStatus bkp_flag_get(void)
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{
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if(RESET != (BKP_TPCS & BKP_FLAG_TAMPER)){
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return SET;
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}else{
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return RESET;
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}
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}
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/*!
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\brief clear tamper flag state
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_flag_clear(void)
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{
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BKP_TPCS |= (uint16_t)(BKP_FLAG_TAMPER >> BKP_TAMPER_BITS_OFFSET);
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}
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/*!
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\brief get tamper interrupt flag state
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\param[in] none
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\param[out] none
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\retval FlagStatus: SET or RESET
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*/
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FlagStatus bkp_interrupt_flag_get(void)
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{
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if(RESET != (BKP_TPCS & BKP_INT_FLAG_TAMPER)){
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return SET;
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}else{
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return RESET;
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}
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}
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/*!
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\brief clear tamper interrupt flag state
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\param[in] none
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\param[out] none
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\retval none
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*/
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void bkp_interrupt_flag_clear(void)
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{
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BKP_TPCS |= (uint16_t)(BKP_INT_FLAG_TAMPER >> BKP_TAMPER_BITS_OFFSET);
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}
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